code: def test_error_latent_model(self):
      self.assertRaises(
          ValueError, BayesianEstimator, self.model_latent, self.d1
      )
  
imports: import unittest
  import numpy
  import pandas
  from joblib.externals.loky import get_reusable_executor
  from pgmpy import config
  from pgmpy.estimators import BayesianEstimator
  from pgmpy.factors.discrete import TabularCPD
  from pgmpy.models import BayesianNetwork
label_desc: Use image node_id 2 for calling the TestBayesianEstimator obj's underlying member method code with example usage: obj.test_error_latent_model() without return types